A pull through for that shaft troubles me. Other than the surface adit (blocked from the surface, only accessible from the shaft), there are no ledges at all, and so a pull through would have to be done with the group all hanging on something 50m down. If that rope gets stuck as you say, a 30m rope won't help at all, it would get you down to about 20m from the bottom, but then what...!
It is about 10m from the surface to the top adit, then a full 100m to the bottom of the shaft.
If you want a pull through trip, take a 220m rope. Either have a sacrificial rope to get you over the edge of the shaft (not preferred as it will just end up as more rubbish for someone else to clear up later) or, preferably, have some bomber bolts just over the shaft lip to hang the 220m+ rope and use a retrievable rope to get you over the edge and onto that main rope with the last person pulling that temp rope out before they start the descent. The same idea with dropping to the surface adit and having bolts there. At least going from the surface adit you know a 200m rope would be sufficient.
If anyone does decide to drop that shaft, please take a stiff brush and some washing-up liquid and give it a clean. :hug: Or better, a jet washer!
